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经营范围
发明名称
MINING MACHINERY
摘要
申请公布号
GB8829327(D0)
申请公布日期
1989.02.01
申请号
GB19880029327
申请日期
1988.12.16
申请人
WINSTER GROUP LIMITED
发明人
分类号
E21C35/22;E21D23/00
主分类号
E21C35/22
代理机构
代理人
主权项
地址
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